Professional Building Cleaning Services Denko Services is your one-stop provider for professional residential and business building cleaning and maintenance. We provide expert and trusted services including Soft Washing, Pressure Washing, Gutter Cleaning, Dryer Vent Cleaning and Window Washing. Serving the Greater Vancouver Area including Langley, Surrey, Burnaby, Coquitlam, Maple Ridge, Aldergrove and beyond. Contact us